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Wu J, Moriwaki K, Asuka T, Nakai R, Kanda S, Taniguchi M, Sugiyama T, Yoshimura SI, Kunii M, Nagasawa T, Hosen N, Miyoshi E, Harada A. EHBP1L1, an apicobasal polarity regulator, is critical for nuclear polarization during enucleation of erythroblasts. Blood Adv 2023:495333. [PMID: 37042948 DOI: 10.1182/bloodadvances.2022008930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 03/13/2023] [Accepted: 03/31/2023] [Indexed: 04/13/2023] Open
Abstract
Cell polarity, the asymmetric distribution of proteins and organelles, is permanently or transiently established in various cell types and plays an important role in many physiological events. EH domain-binding protein 1 like 1 (EHBP1L1) is an adaptor protein that is localized on recycling endosomes and regulates apical-directed transport in polarized epithelial cells. However, the role of EHBP1L1 in non-epithelial cells remains unknown. In this study, Ehbp1l1-/- mice showed impaired erythroblast enucleation. Further analyses showed that nuclear polarization prior to enucleation was impaired in Ehbp1l1-/- erythroblasts. It was also revealed that EHBP1L1 interactors Rab10, Bin1, and dynamin were involved in erythroblast enucleation. In addition, Ehbp1l1-/- erythrocytes exhibited stomatocytic morphology and dehydration. These defects in erythroid cells culminated in early postnatal anemic lethality in Ehbp1l1-/- mice. Moreover, we found the mislocalization of nuclei and mitochondria in the skeletal muscle cells of Ehbp1l1-/- mice, as observed in patients with centronuclear myopathy with genetic mutations in Bin1 or dynamin 2. Taken together, our findings indicate that the Rab8/10-EHBP1L1-Bin1-dynamin axis plays an important role in multiple cell polarity systems in epithelial and non-epithelial cells.
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Affiliation(s)
- Ji Wu
- Osaka university, Suita, Japan
| | | | | | - Ritsuko Nakai
- Osaka University Graduate School of Medicine, Suita, Japan
| | | | | | - Tatsuki Sugiyama
- Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka University, Osaka, Japan
| | | | | | - Takashi Nagasawa
- Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Naoki Hosen
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
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Iwano T, Sobajima T, Takeda S, Harada A, Yoshimura SI. The Rab GTPase-binding protein EHBP1L1 and its interactors CD2AP/CIN85 negatively regulate the length of primary cilia via actin remodeling. J Biol Chem 2023; 299:102985. [PMID: 36754282 PMCID: PMC9986712 DOI: 10.1016/j.jbc.2023.102985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 01/27/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Primary cilia are organelles consisting of axonemal microtubules and plasma membranes, and they protrude from the cell surface to the extracellular region and function in signal sensing and transduction. The integrity of cilia, including the length and structure, is associated with signaling functions; however, factors involved in regulating the integrity of cilia have not been fully elucidated. Here, we showed that the Rab GTPase-binding protein EHBP1L1 and its newly identified interactors CD2AP and CIN85, known as adaptor proteins of actin regulators, are involved in ciliary length control. Immunofluorescence microscopy showed that EHBP1L1 and CD2AP/CIN85 are localized to the ciliary sheath. EHBP1L1 depletion caused mislocalization of CD2AP/CIN85, suggesting that CD2AP/CIN85 localization to the ciliary sheath is dependent on EHBP1L1. Additionally, we determined that EHBP1L1- and CD2AP/CIN85-depleted cells had elongated cilia. The aberrantly elongated cilia phenotype and the ciliary localization defect of CD2AP/CIN85 in EHBP1L1-depleted cells were rescued by the expression of WT EHBP1L1, although this was not observed in the CD2AP/CIN85-binding-deficient mutant, indicating that the EHBP1L1-CD2AP/CIN85 interaction is crucial for controlling ciliary length. Furthermore, EHBP1L1- and CD2AP/CIN85-depleted cells exhibited actin nucleation and branching defects around the ciliary base. Taken together, our data demonstrate that the EHBP1L1-CD2AP/CIN85 axis negatively regulates ciliary length via actin network remodeling around the basal body.
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Affiliation(s)
- Tomohiko Iwano
- Department of Anatomy and Cell Biology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Tomoaki Sobajima
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; Department of Biochemistry, University of Oxford, Oxford, UK
| | - Sén Takeda
- Department of Anatomy and Cell Biology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan; Department of Anatomy, Teikyo University School of Medicine, Itabashi, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
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Wang S, Fu Y, Miyata T, Matsumoto S, Shinoda T, Itoh K, Harada A, Hirotsune S, Jin M. Functional Cooperation of α-Synuclein and Tau Is Essential for Proper Corticogenesis. J Neurosci 2022; 42:7031-7046. [PMID: 35906071 PMCID: PMC9480882 DOI: 10.1523/jneurosci.0396-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 07/07/2022] [Accepted: 07/21/2022] [Indexed: 11/21/2022] Open
Abstract
Alpha-synuclein (αSyn) and tau are abundant multifunctional neuronal proteins, and their intracellular deposits have been linked to many neurodegenerative diseases, including Alzheimer's disease and Parkinson's disease. Despite the disease relevance, their physiological roles remain elusive, as mice with knock-out of either of these genes do not exhibit overt phenotypes. To reveal functional cooperation, we generated αSyn-/-tau-/- double-knock-out mice and characterized the functional cross talk between these proteins during brain development. Intriguingly, deletion of αSyn and tau reduced Notch signaling and accelerated interkinetic nuclear migration of G2 phase at early embryonic stage. This significantly altered the balance between the proliferative and neurogenic divisions of progenitor cells, resulting in an overproduction of early born neurons and enhanced neurogenesis, by which the brain size was enlarged during the embryonic stage in both sexes. On the other hand, a reduction in the number of neural progenitor cells in the middle stage of corticogenesis diminished subsequent gliogenesis in the αSyn-/-tau-/- cortex. Additionally, the expansion and maturation of macroglial cells (astrocytes and oligodendrocytes) were suppressed in the αSyn-/-tau-/- postnatal brain, which in turn reduced the male αSyn-/-tau-/- brain size and cortical thickness to less than the control values. Our study identifies important functional cooperation of αSyn and tau during corticogenesis.SIGNIFICANCE STATEMENT Correct understanding of the physiological functions of αSyn and tau in CNS is critical to elucidate pathogenesis involved in the etiology of neurodegenerative diseases including Alzheimer's disease and Parkinson's disease. We show here that αSyn and tau are cooperatively involved in brain development via maintenance of progenitor cells. αSyn and tau double-knock-out mice exhibited an overproduction of early born neurons and accelerated neurogenesis at early corticogenesis. Furthermore, loss of αSyn and tau also perturbed gliogenesis at later embryonic stage, as well as the subsequent glial expansion and maturation at postnatal brain. Our findings provide new mechanistic insights and extend therapeutic opportunities for neurodegenerative diseases caused by aberrant αSyn and tau.
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Affiliation(s)
- Shengming Wang
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Yu Fu
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Takaki Miyata
- Department of Anatomy and Cell Biology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Sakiko Matsumoto
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Tomoyasu Shinoda
- Department of Anatomy and Cell Biology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Kyoko Itoh
- Department of Pathology and Applied Neurobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Shinji Hirotsune
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Mingyue Jin
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
- Guangxi Key Laboratory of Brain and Cognitive Neuroscience, Guilin Medical University, Guilin, Guangxi 541199, China
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Kondo Y, Ozawa A, Kohno D, Saito K, Buyandalai B, Yamada S, Horiguchi K, Nakajima Y, Shibusawa N, Harada A, Yokoo H, Akiyama H, Sasaki T, Kitamura T, Yamada M. The Hypothalamic Paraventricular Nucleus Is the Center of the Hypothalamic-Pituitary-Thyroid Axis for Regulating Thyroid Hormone Levels. Thyroid 2022; 32:105-114. [PMID: 34726513 DOI: 10.1089/thy.2021.0444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background: Thyrotropin-releasing hormone (TRH) was the first hypothalamic hormone isolated that stimulates pituitary thyrotropin (TSH) secretion. TRH was also later found to be a stimulator of pituitary prolactin and distributed throughout the brain, gastrointestinal tract, and pancreatic β cells. We previously reported the development of TRH null mice (conventional TRHKO), which exhibit characteristic tertiary hypothyroidism and impaired glucose tolerance due to insufficient insulin secretion. Although in the past five decades many investigators, us included, have attempted to determine the hypothalamic nucleus responsible for the hypothalamic-pituitary-thyroid (HPT) axis, it remained obscure because of the broad expression of TRH. Methods: To determine the hypothalamic region functionally responsible for the HPT axis, we established paraventricular nucleus (PVN)-specific TRH knockout (PVN-TRHKO) mice by mating Trh floxed mice and single-minded homolog 1 (Sim1)-Cre transgenic mice. We originally confirmed that most Sim1 was expressed in the PVN using Sim1-Cre/tdTomato mice. Results: These PVN-TRHKO mice exhibited tertiary hypothyroidism similar to conventional TRHKO mice; however, they did not show the impaired glucose tolerance observed in the latter, suggesting that TRH from non-PVN sources is essential for glucose regulation. In addition, a severe reduction in prolactin expression was observed in the pituitary of PVN-TRHKO mice compared with that in TRHKO mice. Conclusions: These findings are conclusive evidence that the PVN is the center of the HPT axis for regulation of serum levels of thyroid hormones and that the serum TSH levels are not decreased in tertiary hypothyroidism. We also noted that TRH from the PVN regulated prolactin, whereas TRH from non-PVN sources regulated glucose metabolism.
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Affiliation(s)
- Yuri Kondo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Atsushi Ozawa
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Daisuke Kohno
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Kazuma Saito
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
- Department of Ophthalmology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Battsetseg Buyandalai
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Sayaka Yamada
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Kazuhiko Horiguchi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Yasuyo Nakajima
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Nobuyuki Shibusawa
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Akihiro Harada
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Hideaki Yokoo
- Department of Human Pathology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hideo Akiyama
- Department of Ophthalmology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Tsutomu Sasaki
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Tadahiro Kitamura
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Masanobu Yamada
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
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Murakami Y, Murakami Y, Kamima T, Abo N, Takahashi T, Kaneko M, Nakano M, Matsubayashi F, Harada A, Taguchi S, Hashimoto T, Oguchi M, Yoshioka Y. Dosimetric Comparison Between 3D Conformal Radiation Therapy Plus Electron Boost and Simultaneous Integrated Boost Volumetric Modulated Arc Therapy for Left-Sided Breast Cancer Patients With a Potential Risk of Radiation-Induced Cardiac Toxicity. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kunii M, Noguchi Y, Yoshimura SI, Kanda S, Iwano T, Avriyanti E, Atik N, Sato T, Sato K, Ogawa M, Harada A. SNAP23 deficiency causes severe brain dysplasia through the loss of radial glial cell polarity. J Cell Biol 2021; 220:e201910080. [PMID: 33332551 PMCID: PMC7754684 DOI: 10.1083/jcb.201910080] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 08/23/2020] [Accepted: 10/23/2020] [Indexed: 02/06/2023] Open
Abstract
In the developing brain, the polarity of neural progenitor cells, termed radial glial cells (RGCs), is important for neurogenesis. Intercellular adhesions, termed apical junctional complexes (AJCs), at the apical surface between RGCs are necessary for cell polarization. However, the mechanism by which AJCs are established remains unclear. Here, we show that a SNARE complex composed of SNAP23, VAMP8, and Syntaxin1B has crucial roles in AJC formation and RGC polarization. Central nervous system (CNS)-specific ablation of SNAP23 (NcKO) results in mice with severe hypoplasia of the neocortex and no hippocampus or cerebellum. In the developing NcKO brain, RGCs lose their polarity following the disruption of AJCs and exhibit reduced proliferation, increased differentiation, and increased apoptosis. SNAP23 and its partner SNAREs, VAMP8 and Syntaxin1B, are important for the localization of an AJC protein, N-cadherin, to the apical plasma membrane of RGCs. Altogether, SNARE-mediated localization of N-cadherin is essential for AJC formation and RGC polarization during brain development.
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Affiliation(s)
- Masataka Kunii
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Yuria Noguchi
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Shin-ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Satoshi Kanda
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tomohiko Iwano
- Department of Anatomy and Cell Biology, Graduate School of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Erda Avriyanti
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Dermatology and Venereology, Faculty of Medicine, Padjadjaran University, Bandung, Indonesia
| | - Nur Atik
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Biomedical Sciences, Faculty of Medicine, Padjadjaran University, Bandung, Indonesia
| | - Takashi Sato
- Laboratory of Developmental Biology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Ken Sato
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | | | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
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Harada T, Sada R, Osugi Y, Matsumoto S, Matsuda T, Hayashi-Nishino M, Nagai T, Harada A, Kikuchi A. Palmitoylated CKAP4 regulates mitochondrial functions through an interaction with VDAC2 at ER-mitochondria contact sites. J Cell Sci 2020; 133:jcs249045. [PMID: 33067255 DOI: 10.1242/jcs.249045] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/29/2020] [Indexed: 12/11/2022] Open
Abstract
Cytoskeleton-associated protein 4 (CKAP4) is a palmitoylated type II transmembrane protein localized to the endoplasmic reticulum (ER). Here, we found that knockout (KO) of CKAP4 in HeLaS3 cells induces the alteration of mitochondrial structures and increases the number of ER-mitochondria contact sites. To understand the involvement of CKAP4 in mitochondrial functions, the binding proteins of CKAP4 were explored, enabling identification of the mitochondrial porin voltage-dependent anion-selective channel protein 2 (VDAC2), which is localized to the outer mitochondrial membrane. Palmitoylation at Cys100 of CKAP4 was required for the binding between CKAP4 and VDAC2. In CKAP4 KO cells, the binding of inositol trisphosphate receptor (IP3R) and VDAC2 was enhanced, the intramitochondrial Ca2+ concentration increased and the mitochondrial membrane potential decreased. In addition, CKAP4 KO decreased the oxidative consumption rate, in vitro cancer cell proliferation under low-glucose conditions and in vivo xenograft tumor formation. The phenotypes were not rescued by expression of a palmitoylation-deficient CKAP4 mutant. These results suggest that CKAP4 plays a role in maintaining mitochondrial functions through the binding to VDAC2 at ER-mitochondria contact sites and that palmitoylation is required for this novel function of CKAP4.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Takeshi Harada
- Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
| | - Ryota Sada
- Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
| | - Yoshito Osugi
- Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
| | - Shinji Matsumoto
- Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
| | - Tomoki Matsuda
- Department of Biomolecular Science and Engineering, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, 8-1 Mihogaoka, Osaka 567-0047, Japan
| | - Mitsuko Hayashi-Nishino
- Department of Biomolecular Science and Regulation and Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, 8-1 Mihogaoka, Osaka 567-0047, Japan
| | - Takeharu Nagai
- Department of Biomolecular Science and Engineering, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, 8-1 Mihogaoka, Osaka 567-0047, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
| | - Akira Kikuchi
- Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 565-0871, Japan
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Araki K, Miyagawa S, Kawamura T, Ishii R, Harada A, Ueno T, Toda K, Kuratani T, Sawa Y. Autologous skeletal myoblast sheet prevents cardiomyocyte ischemia and right heart dysfunction in pressure-overloaded right heart porcine model. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Severe heart failure (HF) with congenital heart disease (CHD) have demonstrated life threatening disorder despite of remarkable progress in medical therapies. Autologous skeletal myoblast sheet transplantation therapy showed clinical efficacy for left ventricular dysfunction by cytokine paracrine effects, which are expected to be sufficiently effective against right ventricular (RV) dysfunction which is often seen in end-stage of CHD patients with severe HF.
Hypothesis
An autologous skeletal myoblast sheet transplantation alleviates RV dysfunction in a pressure-overloaded right heart in a porcine model.
Methods
Five-to-six-month-old Göttingen mini-pigs underwent pulmonary artery banding with vascular occluding system. To create the porcine model of chronic pressure-overloaded right heart, vascular occluding system was gradually inflated, over a month, to make pulmonary stenosis to banding velocity >3.0 m/s measured by echocardiography (UCG), and then fixed for another month. Two months after banding, autologous skeletal myoblast sheet was placed on the epicardium of the RV free wall and followed for 2 months. Groups were as follows: control (C, n=5), sheet implantation (S, n=5). Cardiac function was measured using UCG, cardiac computed tomography (CT), and cardiac catheterization (Cath). Two months after sheet implantation, hearts were dissected for histologic analysis.
Results
Before sheet implantation, RV dysfunction was equal in groups; however, 2 months after sheet implantation, RV dysfunction and myocardial ischemia was significantly ameliorated in group S than group C. On CT, RV ejection fraction exacerbation were well controlled in Group S compared to Group C (S 44.9±2.2 vs C 31.9±2.1% [p=0.0042]). UCG and Cath revealed well maintained systolic and diastolic function in Group S compared to Group C (Tei index: S 0.42±0.06 vs C 0.70±0.07 [p=0.0240], Fraction Area Change: S 45.8±7.8 vs C 19.5±1.3% [p=0.0240], Isovolumic Relaxation Time; S 44.3±9.2 vs C 97.3±9.5 ms [p=0.0304]). On C11-Acetate Positron Emission Tomography, myocardial ischemia was more prominent in Group C compared to Group S (K mono-Rest/Stress: S 3.17±0.69 vs C 2.03±0.65 min-1 [p=0.0421], Myocardial Blood Flow-Rest/Stress: S 3.22±0.39 vs C 2.13±0.92 min-1 [p=0.0421]). In histologic analysis, Group S presented less progressed hypertrophic change in periodic acid-Schiff stain (S 13.5±0.9 vs C 18.0±3.0 μg [p=0.0240]), anti-fibrotic changes in picrosirius red stain (S 3.0±0.3 vs C 4.2±0.2% [p=0.0421]), more angiogenesis in CD31 expression (S 18.3±1.5 vs C 10.7±2.8 / 104 μm2 [p=0.0240]), and less production of reactive oxygen species in fluorescent immunostaining (S 5.9±1.7 vs C 18.4±1.7% [p=0.0304]).
Conclusion
Autologous skeletal myoblast sheet transplantation alleviates cardiomyocyte Ischemia and RV dysfunction in a porcine model of pressure-overloaded right heart.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Araki
- Osaka University, Osaka, Japan
| | | | | | - R Ishii
- Osaka University, Osaka, Japan
| | | | - T Ueno
- Osaka University, Osaka, Japan
| | - K Toda
- Osaka University, Osaka, Japan
| | | | - Y Sawa
- Osaka University, Osaka, Japan
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Nakazato T, Miyagawa S, Uemura T, Liu L, Li J, Sasai M, Harada A, Toda K, Sawa Y. Functional engineered heart tissue cultured in a rotating wall vessel bioreactor improve cardiac function in the distressed rat heart. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction
How to construct massive cardiac tissue and culture it with functional improvement may be crucial as cardiomyogenesis in failed heart. We previously presented that dynamic culture in a rotating wall vessel (RWV) bioreactor could provide a better culture environment for maintenance of the engineered 3D cardiac tissue. However, it is unknown about the effect of the tissue cultured in a RWV bioreactor on engraftment and improvement of function in the distressed rat heart.
Hypothesis
We hypothesized that the engineered 3D cardiac tissue cultured in a RWV bioreactor could improve its engraftment and lead recovery of cardiac function in rat infarction model.
Methods
We made engineered cardiac tissue by seeding 2.0 × 106 human induced pluripotent stem cell derived cardiomyocytes on the PLGA fiber sheet. It was cultured in the RWV bioreactor for seven days (RWV group). For the control, static culture has been done. After in vitro assessment, these tissues were transplanted to myocardial infarction model nude rats (sham, control, and RWV group, n=10, respectively) and cardiac performance was evaluated by ultrasonography. Four weeks after transplantation, we evaluated their hearts by histological analysis.
Results
The RWV group demonstrated maturation of cardiomyocytes evidenced by significantly higher expression of Troponin T (TnT), sarcomeric α actinin (SAA), connexin 43 (Cx43) and myosin heavy chain 7 (MYH7) than the control by Western blots (TnT; 2.7±1.0 vs. 1.0±0.4, p<0.01, SAA; 2.1±0.7 vs. 1.0±0.2, p<0.01, Cx 43; 2.0±0.6 vs. 1.0±0.1, p<0.05, MYH7; 10.9±2.7 vs. 1.0±0.1, p<0.01). In the culture supernatant, the concentration of cytokines related to angiogenesis was significantly higher in the RWV group than in the control (VEGF; 29.6±7.4 vs. 12.2±4.3pg/ml, p<0.01, HGF; 72.7±9.9 vs. 42.6±5.9pg/ml, p<0.01). Four weeks after transplantation, the left ventricular ejection fraction was significantly improved in the RWV group than in the control (RWV vs. control; 47±4.9 vs. 38±6.9%, p<0.01). On histological analysis, more engineered cardiac tissue survived in the RWV group than in the control (RWV vs. control; 7/10 vs. 3/10, p=0.18). A vascular-like structure double-stained with isolectin B4 and smooth muscle actin was partially observed in the transplanted tissue. LV remodeling exhibiting extracellular collagen deposition (fibrotic area, RWV vs. control; 17±4.3 vs. 24±5.2%, p<0.05) and cardiomyocyte hypertrophy (RWV vs. control; 16±1.7 vs. 18±2.1μm, p<0.05) was significantly attenuated in RWV group than in the control. Neovascularization was significantly noted in the RWV group compared with the control (capillary density, RWV vs. control; 545±113 vs. 356±92, p<0.01).
Conclusion
Functional engineered 3D cardiac tissue cultured in a RWV bioreactor could induce angiogenesis and improved its engraftment, leading significant improvement of cardiac function in rat infarction model.
Dynamic culture in a RWV bioreactor
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Japan Society for the Promotion of Science
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Affiliation(s)
- T Nakazato
- Osaka University Graduate School of Medicine, Suita, Japan
| | - S Miyagawa
- Osaka University Graduate School of Medicine, Suita, Japan
| | - T Uemura
- JTEC CORPORATION, Ibaraki, Japan
| | - L Liu
- Osaka University Graduate School of Medicine, Suita, Japan
| | - J Li
- Osaka University Graduate School of Medicine, Suita, Japan
| | - M Sasai
- Osaka University Graduate School of Medicine, Suita, Japan
| | - A Harada
- Osaka University Graduate School of Medicine, Suita, Japan
| | - K Toda
- Osaka University Graduate School of Medicine, Suita, Japan
| | - Y Sawa
- Osaka University Graduate School of Medicine, Suita, Japan
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10
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Fujimoto D, Otake H, Kawamori H, Toba T, Nagao M, Sugizaki Y, Nagasawa A, Takeshige R, Harada A, Murakami K, Iino T, Irino Y, Toh R, Hirata K. Cholesterol uptake capacity: a new measure of HDL functionality as a predictor of subsequent revascularization in patients undergoing percutaneous coronary intervention. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Recent studies have demonstrated the importance of high-density lipoprotein (HDL) functionality in the development of de novo coronary artery disease by using the cholesterol-efflux capacity, a measure of the ability of HDL to promote cholesterol removal from lipid-laden macrophages. Recently, we developed a rapid cell-free assay system to directly evaluate the capacity of HDL to accept additional cholesterol; the measurement of the cholesterol-uptake capacity (CUC) enables HDL functionality to be readily evaluated in our daily practice. However, prognostic implication of CUC measurement at the timing of percutaneous coronary intervention (PCI) remains unclear.
Purpose
We aimed to evaluate the association between baseline CUC and revascularization during follow-up in the patients who underwent PCI.
Methods
We retrospectively reviewed the patients who underwent PCI with follow-up coronary angiography (CAG) or ischemic-driven revascularization. The patients who had the frozen blood samples of which CUC were measurable at the index PCI and follow-up CAG or revascularization were enrolled. We excluded the patients under hemodialysis.
Results
Among a total of 703 consecutive patients who underwent PCI between Dec 2014 and Mar 2019, we finally enrolled 74 patients who underwent ischemic-driven revascularization (revascularization group) and 183 patients who underwent follow-up CAG without revascularization (non-revascularization group).There were no significant difference in baseline traditional cardiovascular risk factors between the groups. However, the presence of diabetes was significantly more frequent in the revascularization group (63.5% vs 41.0%; P=0.001) than in the non-revascularization group. CUC at the index PCI was significantly lower in the revascularization group than in the non-revascularization group (87.0±19.5 vs 93.9±19.2; P=0.004). Multivariate logistic regression analysis revealed that impaired HDL functionality assessed by decreased CUC level at the index PCI (odds ratio; 0.984, 95% confidence interval; 0.969–1.000) was independently associated with subsequent revascularization after PCI. Indeed, there was a graded inverse association between increasing tertiles of CUC levels and the incidence of revascularization during a median follow-up of 881 days (Figure). Especially in the subgroup analysis of non-diabetic patients, decreased CUC level at the index PCI was independently associated with subsequent revascularization (odds ratio; 0.947, 95% confidence interval; 0.915–0.981), while not in diabetic population.
Conclusion
Serum CUC level at the index procedure was associated with subsequent revascularization especially in non-diabetic patients who underwent PCI.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- D Fujimoto
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - H Otake
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - H Kawamori
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Toba
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - M Nagao
- Kobe University Graduate School of Medicine, Division of Evidence-based Laboratory Medicine, Kobe, Japan
| | - Y Sugizaki
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - A Nagasawa
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - R Takeshige
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - A Harada
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - K Murakami
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - T Iino
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - Y Irino
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - R Toh
- Kobe University Graduate School of Medicine, Division of Evidence-based Laboratory Medicine, Kobe, Japan
| | - K Hirata
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
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11
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Tanaka S, Masuda Y, Harada A, Okabe S. Impaired actin dynamics and suppression of Shank2-mediated spine enlargement in cortactin knockout mice. ACTA ACUST UNITED AC 2020; 69:44-52. [PMID: 31990031 DOI: 10.1093/jmicro/dfaa001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 01/05/2020] [Accepted: 01/06/2020] [Indexed: 12/22/2022]
Abstract
Cortactin regulates actin polymerization and stabilizes branched actin network. In neurons, cortactin is enriched in dendritic spines that contain abundant actin polymers. To explore the function of cortactin in dendritic spines, we examined spine morphology and dynamics in cultured neurons taken from cortactin knockout (KO) mice. Histological analysis revealed that the density and morphology of dendritic spines were not significantly different between wild-type (WT) and cortactin KO neurons. Time-lapse imaging of hippocampal slice cultures showed that the extent of spine volume change was similar between WT and cortactin KO neurons. Despite little effect of cortactin deletion on spine morphology and dynamics, actin turnover in dendritic spines was accelerated in cortactin KO neurons. Furthermore, we detected a suppressive effect of cortactin KO on spine head size under the condition of excessive spine enlargement induced by overexpression of a prominent postsynaptic density protein Shank2. These results suggest that cortactin may have a role in maintaining actin organization by stabilizing actin filaments near the postsynaptic density.
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Affiliation(s)
- Shinji Tanaka
- Department of Cellular Neurobiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasutaka Masuda
- Department of Cellular Neurobiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-0033, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shigeo Okabe
- Department of Cellular Neurobiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-0033, Japan
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12
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Munezane H, Oizumi H, Wakabayashi T, Nishio S, Hirasawa T, Sato T, Harada A, Yoshida T, Eguchi T, Yamanashi Y, Hashimoto T, Iwatsubo T. Roles of Collagen XXV and Its Putative Receptors PTPσ/δ in Intramuscular Motor Innervation and Congenital Cranial Dysinnervation Disorder. Cell Rep 2020; 29:4362-4376.e6. [PMID: 31875546 DOI: 10.1016/j.celrep.2019.11.112] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 09/23/2019] [Accepted: 11/26/2019] [Indexed: 10/25/2022] Open
Abstract
Intramuscular motor innervation is an essential process in neuromuscular development. Recently, mutations in COL25A1, encoding CLAC-P/collagen XXV, have been linked to the development of a congenital cranial dysinnervation disorder (CCDD). Yet the molecular mechanisms of intramuscular innervation and the etiology of CCDD related to COL25A1 have remained elusive. Here, we report that muscle-derived collagen XXV is indispensable for intramuscular innervation. In developing skeletal muscles, Col25a1 expression is tightly regulated by muscle excitation. In vitro and cell-based assays reveal a direct interaction between collagen XXV and receptor protein tyrosine phosphatases (PTPs) σ and δ. Motor explant assays show that expression of collagen XXV in target cells attracts motor axons, but this is inhibited by exogenous PTPσ/δ. CCDD mutations attenuate motor axon attraction by reducing collagen XXV-PTPσ/δ interaction. Overall, our study identifies PTPσ/δ as putative receptors for collagen XXV, implicating collagen XXV and PTPσ/δ in intramuscular innervation and a developmental ocular motor disorder.
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Affiliation(s)
- Haruka Munezane
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Hiroaki Oizumi
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tomoko Wakabayashi
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan; Department of Innovative Dementia Prevention, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.
| | - Shu Nishio
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tomoko Hirasawa
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Takashi Sato
- Laboratory of Developmental Biology and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Tomoyuki Yoshida
- Department of Molecular Neuroscience, University of Toyama, Toyama 930-0194, Japan
| | - Takahiro Eguchi
- Division of Genetics, Department of Cancer Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Yuji Yamanashi
- Division of Genetics, Department of Cancer Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Tadafumi Hashimoto
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan; Department of Innovative Dementia Prevention, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Takeshi Iwatsubo
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.
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13
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Iwaki A, Moriwaki K, Sobajima T, Taniguchi M, Yoshimura SI, Kunii M, Kanda S, Kamada Y, Miyoshi E, Harada A. Loss of Rab6a in the small intestine causes lipid accumulation and epithelial cell death from lactation. FASEB J 2020; 34:9450-9465. [PMID: 32496646 DOI: 10.1096/fj.202000028r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/24/2020] [Accepted: 05/05/2020] [Indexed: 11/11/2022]
Abstract
Intestinal epithelial cells (IECs) are not only responsible for the digestion and absorption of dietary substrates but also function as a first line of host defense against commensal and pathogenic luminal bacteria. Disruption of the epithelial layer causes malnutrition and enteritis. Rab6 is a small GTPase localized to the Golgi, where it regulates anterograde and retrograde transport by interacting with various effector proteins. Here, we generated mice with IEC-specific deletion of Rab6a (Rab6a∆IEC mice). While Rab6aΔIEC mice were born at the Mendelian ratio, they started to show IEC death, inflammation, and bleeding in the small intestine shortly after birth, and these changes culminated in early postnatal death. We further found massive lipid accumulation in the IECs of Rab6a∆IEC neonates. In contrast to Rab6a∆IEC neonates, knockout embryos did not show any of these abnormalities. Lipid accumulation and IEC death became evident when Rab6a∆IEC embryos were nursed by a foster mother, suggesting that dietary milk-derived lipids accumulated in Rab6a-deficient IECs and triggered IEC death. These results indicate that Rab6a plays a crucial role in regulating the lipid transport and maintaining tissue integrity.
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Affiliation(s)
- Ayano Iwaki
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan.,Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Kenta Moriwaki
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Tomoaki Sobajima
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan.,Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Manabu Taniguchi
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Masataka Kunii
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Satoshi Kanda
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Yoshihiro Kamada
- Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Eiji Miyoshi
- Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Japan
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14
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Harada A, Goto M, Ikeya M, Takenaka N, Tanaka A, Sakurai H. Neonatal transplantation of iPSC-derived MSCs affects systemic collagen vi restoration in ullrich congenital muscular dystrophy mice. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Tsukasaki K, Matsui Y, Arai H, Harada A, Tomida M, Takemura M, Otsuka R, Ando F, Shimokata H. Association of Muscle Strength and Gait Speed with Cross-Sectional Muscle Area Determined by Mid-Thigh Computed Tomography - A Comparison with Skeletal Muscle Mass Measured by Dual-Energy X-Ray Absorptiometry. J Frailty Aging 2020; 9:82-89. [PMID: 32259181 DOI: 10.14283/jfa.2020.16] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Muscle mass is often mentioned not to reflect muscle strength. For muscle mass assessment skeletal muscle index (SMI) is often used. We have reported that dual-energy X-ray absorptiometry (DXA)-derived SMI does not change with age in women, whereas the cross-sectional muscle area (CSMA) derived from computed tomography (CT) does. OBJECTIVES The present study aimed to compare CT and DXA for the assessment of muscle tissue. DESIGN AND SETTING Cross-sectional study in the local residents. PARTICIPANTS A total of 1818 subjects (age 40-89 years) randomly selected from community dwellers underwent CT examination of the right mid-thigh to measure the cross-sectional muscle area (CSMA). Skeletal muscle mass (SMM) was measured by DXA. The subjects performed physical function tests such as grip strength, knee extension strength, leg extension strength, and gait speed. The correlation between CT-derived CSMA and DXA-derived SMM along with their association with physical function was examined. RESULTS After controlling for related factors, the partial correlation coefficient of muscle cross-sectional area (CSA) with physical function was larger than that of DXA-derived SMM for gait speed in men (p=0.002) and knee extension strength in women (p=0.03). The partial correlation coefficient of quadriceps (Qc) CSA with physical function was larger than that of DXA-derived SMM for leg extension power in both sexes (p=0.01), gait speed in men (p<0.001), and knee extension strength in women (p<0.001). CONCLUSION Mid-thigh CT-derived CSMA, especially Qc CSA, showed significant associations with grip strength, knee extension strength, and leg extension power, which were equal to or stronger than those of DXA-derived SMM in community-dwelling middle-aged and older Japanese people. The mid-thigh CSMA may be a predictor of mobility disability, and is considered to be useful in the diagnosis of sarcopenia.
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Affiliation(s)
- K Tsukasaki
- Yasumoto Matsui, Center for Frailty and Locomotive syndrome, National Center for Geriatrics and Gerontology, 7-430. Morioka-cho, Obu, Aichi, Japan, e-mail address: , telephone 81-522-046-2311, fax numbers:81-562-44-8518
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16
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Harada A, Torisu T, Esaki M. Gastrointestinal: Burkitt lymphoma showing multiple tumorous lesions in the gastrointestinal tract. J Gastroenterol Hepatol 2020; 35:361. [PMID: 31693241 DOI: 10.1111/jgh.14885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/19/2019] [Accepted: 10/03/2019] [Indexed: 12/09/2022]
Affiliation(s)
- A Harada
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Torisu
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - M Esaki
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Endoscopic Diagnostics and Therapeutics, Saga University Hospital, Saga, Japan
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17
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Goto T, Miyagawa S, Tamai K, Matsuura R, Harada A, Ueno T, Toda K, Kuratani T, Sawa Y. P5391Systemic administration of high-mobility group box 1 can suppress adverse post-infarction ventricular remodeling in a rat infarction model by enhancing self-regeneration. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
High-mobility group box 1 protein (HMGB1) reportedly enhances CXCR4-positive bone marrow-derived mesenchymal stem cell (BM-MSC) recruitment to damaged tissue to promote tissue regeneration.
Purpose
Our aim of this study is to evaluate whether systemic administration of HMGB1 might promote tissue repair in a rat myocardial infarction (MI) model.
Methods
We prepared 26 MI model rats with high ligation of the left coronary artery. Two weeks later, HMGB1 (3 mg/kg/day) or phosphate-buffered saline (control: 3 mL/kg/day) was administered for 4 days via femoral vein. Cardiac performance was evaluated by ultrasonography, left ventricular (LV) remodeling via immunostaining. We then used immunostaining to examine MSC recruitment to damaged tissue in green fluorescent protein bone marrow transplantation (GFP-BMT) model rats, and also performed intravital imaging using two-photon microscopy to visualize BM-cells recruitment in real time.
Results
Compared with control rats, there was a significant improvement in the left ventricular ejection fraction of the HMGB1 group (HMGB1 vs. control: 48.6% ± 5.5% vs. 33.6% ± 5.4%; p<0.01) at 4 weeks after each administration. LV remodeling, characterized by interstitial fibrosis, cardiomyocyte hypertrophy, and a decrease of capillary density, was significantly attenuated in the HMGB1 group compared with control rats. On QT-PCR analysis, VEGF mRNA expression was significantly higher in the HMGB1 group than in the control (border zone; 1.6±0.6 vs. 1.1±0.2; p=0.02, septal zone; 1.1±0.1 vs. 0.9±0.1; p<0.01). In GFP-BMT rats, GFP+/PDGFR+ cells were significantly mobilized to the border zone in the HMGB1 group compared with the control (1331±197 vs. 615±45 /mm2; p<0.01), leading to formation of newly developed vasculature (Figure 1). In intravital imaging, more GFP+ cells were mobilized to the infarction area in the HMGB1 group than in the control, which was further enhanced at 12h later. Additionally, SDF-1 expression in the peri-infarction area increased significantly in MI rats compared with normal rats (MI vs. normal; 2.1±0.4 vs. 0.9±0.1; p<0.01), in where some cell-adhesions of vascular endothelial cells were destroyed.
Conclusions
Systemic administration of HMGB1 mobilized BM-MSCs to the damaged myocardium via the SDF-1/CXCR4 signaling complex. Those BM-MSCs might migrate to extracellular matrix in the border zone via the gap of each endothelial cell, leading to induction of angiogenesis and reduced fibrosis.
Acknowledgement/Funding
None
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Affiliation(s)
- T Goto
- Osaka University Graduate School of Medicine, Suita, Japan
| | - S Miyagawa
- Osaka University Graduate School of Medicine, Suita, Japan
| | - K Tamai
- Osaka University Graduate School of Medicine, Department of Stem Cell Therapy Science, Osaka, Japan
| | - R Matsuura
- Osaka University Graduate School of Medicine, Suita, Japan
| | - A Harada
- Osaka University Graduate School of Medicine, Suita, Japan
| | - T Ueno
- Osaka University Graduate School of Medicine, Suita, Japan
| | - K Toda
- Osaka University Graduate School of Medicine, Suita, Japan
| | - T Kuratani
- Osaka University Graduate School of Medicine, Department of Minimally Invasive Cardiovascular Medicine, Osaka, Japan
| | - Y Sawa
- Osaka University Graduate School of Medicine, Suita, Japan
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18
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Murakami K, Kiriyama M, Kubo T, Saiki N, Miwa K, Irino Y, Toh R, Hirata K, Harada A. Establishment Of An Automated Assay For Cholesterol Uptake Capacity, A New Concept Of High-Density Lipoprotein Functionality. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Takahara M, Kunii M, Nakamura K, Harada A, Hirano T, Katoh Y, Nakayama K. C11ORF74 interacts with the IFT-A complex and participates in ciliary BBSome localization. J Biochem 2019; 165:257-267. [PMID: 30476139 DOI: 10.1093/jb/mvy100] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/20/2018] [Indexed: 12/18/2022] Open
Abstract
Cilia are organelles that serve as cellular antennae. Intraflagellar transport particles containing the IFT-A and IFT-B complexes mediate bidirectional trafficking of ciliary proteins. Particularly, in concert with the BBSome complex, IFT particles play an essential role in trafficking of ciliary G-protein-coupled receptors (GPCRs). Therefore, proteins interacting with the IFT components are potential regulators of ciliary protein trafficking. We here revealed that an uncharacterized protein, C11ORF74, interacts with the IFT-A complex via the IFT122 subunit and is accumulated at the distal tip in the absence of an IFT-A subunit IFT139, suggesting that at least a fraction of C11ORF74 molecules can be transported towards the ciliary tip by associating with the IFT-A complex, although its majority might be out of cilia at steady state. In C11ORF74-knockout (KO) cells, the BBSome components cannot enter cilia. However, trafficking of Smoothened or GPR161, both of which are ciliary GPCRs involved in Hedgehog signalling and undergo BBSome-dependent trafficking, was not affected in the absence of C11ORF74. In addition, C11orf74/B230118H07Rik- KO mice demonstrated no obvious anatomical abnormalities associated with ciliary dysfunctions. Given that C11ORF74 is conserved across vertebrates, but not found in other ciliated organisms, such as nematodes and Chlamydomonas, it might play limited roles involving cilia.
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Affiliation(s)
- Mariko Takahara
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, Japan
| | - Masataka Kunii
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, Japan
| | - Kentaro Nakamura
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, Japan
| | - Tomoaki Hirano
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, Japan
| | - Yohei Katoh
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, Japan
| | - Kazuhisa Nakayama
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, Japan
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20
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Venditti R, Masone MC, Rega LR, Di Tullio G, Santoro M, Polishchuk E, Serrano IC, Olkkonen VM, Harada A, Medina DL, La Montagna R, De Matteis MA. The activity of Sac1 across ER-TGN contact sites requires the four-phosphate-adaptor-protein-1. J Cell Biol 2019; 218:783-797. [PMID: 30659099 PMCID: PMC6400556 DOI: 10.1083/jcb.201812021] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 12/14/2018] [Accepted: 12/19/2018] [Indexed: 01/05/2023] Open
Abstract
Venditti et al. identify FAPP1 as a new determinant of ER–trans-Golgi network contacts that interacts with the phosphoinositide phosphatase Sac1 and promotes its phosphatase activity. The results suggest that, by controlling PI4P levels, FAPP1 acts as a gatekeeper of cargo Golgi exit. Phosphatidylinositol-4-phosphate (PI4P), a phosphoinositide with key roles in the Golgi complex, is made by Golgi-associated phosphatidylinositol-4 kinases and consumed by the 4-phosphatase Sac1 that, instead, is an ER membrane protein. Here, we show that the contact sites between the ER and the TGN (ERTGoCS) provide a spatial setting suitable for Sac1 to dephosphorylate PI4P at the TGN. The ERTGoCS, though necessary, are not sufficient for the phosphatase activity of Sac1 on TGN PI4P, since this needs the phosphatidyl-four-phosphate-adaptor-protein-1 (FAPP1). FAPP1 localizes at ERTGoCS, interacts with Sac1, and promotes its in-trans phosphatase activity in vitro. We envision that FAPP1, acting as a PI4P detector and adaptor, positions Sac1 close to TGN domains with elevated PI4P concentrations allowing PI4P consumption. Indeed, FAPP1 depletion induces an increase in TGN PI4P that leads to increased secretion of selected cargoes (e.g., ApoB100), indicating that FAPP1, by controlling PI4P levels, acts as a gatekeeper of Golgi exit.
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Affiliation(s)
- Rossella Venditti
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy.,Department of Molecular Medicine and Medical Biotechnology, University of Napoli Federico II, Medical School, Naples, Italy
| | | | - Laura Rita Rega
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
| | | | - Michele Santoro
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
| | | | | | - Vesa M Olkkonen
- Minerva Foundation Institute for Medical Research, Biomedicum 2U, Helsinki, Finland.,Department of Anatomy, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | | | - Diego L Medina
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy
| | | | - Maria Antonietta De Matteis
- Telethon Institute of Genetics and Medicine, Pozzuoli, Italy .,Department of Molecular Medicine and Medical Biotechnology, University of Napoli Federico II, Medical School, Naples, Italy
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21
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Matsui S, Sasaki T, Kohno D, Yaku K, Inutsuka A, Yokota-Hashimoto H, Kikuchi O, Suga T, Kobayashi M, Yamanaka A, Harada A, Nakagawa T, Onaka T, Kitamura T. Neuronal SIRT1 regulates macronutrient-based diet selection through FGF21 and oxytocin signalling in mice. Nat Commun 2018; 9:4604. [PMID: 30389922 PMCID: PMC6214990 DOI: 10.1038/s41467-018-07033-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 10/12/2018] [Indexed: 12/02/2022] Open
Abstract
Diet affects health through ingested calories and macronutrients, and macronutrient balance affects health span. The mechanisms regulating macronutrient-based diet choices are poorly understood. Previous studies had shown that NAD-dependent deacetylase sirtuin-1 (SIRT1) in part influences the health-promoting effects of caloric restriction by boosting fat use in peripheral tissues. Here, we show that neuronal SIRT1 shifts diet choice from sucrose to fat in mice, matching the peripheral metabolic shift. SIRT1-mediated suppression of simple sugar preference requires oxytocin signalling, and SIRT1 in oxytocin neurons drives this effect. The hepatokine FGF21 acts as an endocrine signal to oxytocin neurons, promoting neuronal activation and Oxt transcription and suppressing the simple sugar preference. SIRT1 promotes FGF21 signalling in oxytocin neurons and stimulates Oxt transcription through NRF2. Thus, neuronal SIRT1 contributes to the homeostatic regulation of macronutrient-based diet selection in mice.
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Affiliation(s)
- Sho Matsui
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Tsutomu Sasaki
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan.
| | - Daisuke Kohno
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
- Advanced Scientific Research Leaders Development Unit, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Keisuke Yaku
- Frontier Research Core for Life Science, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930-0194, Japan
- Department of Metabolism and Nutrition, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930-0194, Japan
| | - Ayumu Inutsuka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Furocho, Nagoya, 464-8601, Japan
- Division of Brain and Neurophysiology, Department of Physiology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Hiromi Yokota-Hashimoto
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Osamu Kikuchi
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Takayoshi Suga
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Masaki Kobayashi
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Furocho, Nagoya, 464-8601, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takashi Nakagawa
- Frontier Research Core for Life Science, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930-0194, Japan
- Department of Metabolism and Nutrition, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930-0194, Japan
| | - Tatsushi Onaka
- Division of Brain and Neurophysiology, Department of Physiology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Tadahiro Kitamura
- Laboratory of Metabolic Signal, Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8512, Japan.
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22
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Harada A, Umeno J, Esaki M. Gastrointestinal: Multiple venous malformations and polyps of the small intestine in Cowden syndrome. J Gastroenterol Hepatol 2018; 33:1819. [PMID: 29952025 DOI: 10.1111/jgh.14304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 05/28/2018] [Indexed: 01/23/2023]
Affiliation(s)
- A Harada
- Kyushu University, Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Fukuoka, Japan
| | - J Umeno
- Kyushu University, Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Fukuoka, Japan
| | - M Esaki
- Kyushu University, Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Fukuoka, Japan
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23
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Harada A, Sumi M, Toshiyasu T, Yoshioka Y, Takazawa Y, Ae K, Matsumoto S, Oguchi M. Palliative Radiation Therapy for Spinal Metastasis from Myxoid Liposarcoma. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Aoyagi K, Itakura M, Fukutomi T, Nishiwaki C, Nakamichi Y, Torii S, Makiyama T, Harada A, Ohara-Imaizumi M. VAMP7 Regulates Autophagosome Formation by Supporting Atg9a Functions in Pancreatic β-Cells From Male Mice. Endocrinology 2018; 159:3674-3688. [PMID: 30215699 DOI: 10.1210/en.2018-00447] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 09/05/2018] [Indexed: 12/24/2022]
Abstract
Dysfunctional mitochondria are observed in β-cells of diabetic patients, which are eventually removed by autophagy. Vesicle-associated membrane protein (VAMP)7, a vesicular SNARE protein, regulates autophagosome formation to maintain mitochondrial homeostasis and control insulin secretion in pancreatic β-cells. However, its molecular mechanism is largely unknown. In this study, we investigated the molecular mechanism of VAMP7-dependent autophagosome formation using VAMP7-deficient β-cells and β-cell-derived Min6 cells. VAMP7 localized in autophagy-related (Atg)9a-resident vesicles of recycling endosomes (REs), which contributed to autophagosome formation, and it interacted with Hrb, Syntaxin16, and SNAP-47. Hrb recruited VAMP7 and Atg9a from the plasma membrane to REs. Syntaxin16 and SNAP-47 mediated autophagosome formation at a step later than the proper localization of VAMP7 to Atg9a-resident vesicles. Knockdown of Hrb, Syntaxin16, and SNAP-47 resulted in defective autophagosome formation, accumulation of dysfunctional mitochondria, and impairment of glucose-stimulated insulin secretion. Our data indicate that VAMP7 and Atg9a are initially recruited to REs to organize VAMP7 and Atg9a-resident vesicles in an Hrb-dependent manner. Additionally, VAMP7 forms a SNARE complex with Syntaxin16 and SNAP-47, which may cause fusions of Atg9a-resident vesicles during autophagosome formation. Thus, VAMP7 participates in autophagosome formation by supporting Atg9a functions that contribute to maintenance of mitochondrial quality.
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Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Toshiyuki Fukutomi
- Department of Pharmacology, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Seiji Torii
- Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Tomohiko Makiyama
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
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25
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Abstract
Sobajima et al. identify the novel protein RELCH/KIAA1468 as a Rab11-binding protein and show that RELCH/KIAA1468 and Rab11 regulate OSBP-dependent nonvesicular cholesterol transport from recycling endosomes to the trans-Golgi network. Cholesterol, which is endocytosed to the late endosome (LE)/lysosome, is delivered to other organelles through vesicular and nonvesicular transport mechanisms. In this study, we discuss a novel mechanism of cholesterol transport from recycling endosomes (REs) to the trans-Golgi network (TGN) through RELCH/KIAA1468, which is newly identified in this study as a Rab11-GTP– and OSBP-binding protein. After treating cells with 25-hydroxycholesterol to induce OSBP relocation from the cytoplasm to the TGN, REs accumulated around the TGN area, but this accumulation was diminished in RELCH- or OSBP-depleted cells. Cholesterol content in the TGN was decreased in Rab11-, RELCH-, and OSBP-depleted cells and increased in the LE/lysosome. According to in vitro reconstitution experiments, RELCH tethers Rab11-bound RE-like and OSBP-bound TGN-like liposomes and promotes OSBP-dependent cholesterol transfer from RE-like to TGN-like liposomes. These data suggest that RELCH promotes nonvesicular cholesterol transport from REs to the TGN through membrane tethering.
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Affiliation(s)
- Tomoaki Sobajima
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan.,Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tomomi Maeda
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan.,Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Haruhiko Miyata
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka, Japan
| | - Eiji Miyoshi
- Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
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26
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Shiraishi K, Shindo A, Harada A, Kurumizaka H, Kimura H, Ohkawa Y, Matsuyama H. Roles of histone H3.5 in human spermatogenesis and spermatogenic disorders. Andrology 2017; 6:158-165. [DOI: 10.1111/andr.12438] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/06/2017] [Accepted: 10/02/2017] [Indexed: 12/11/2022]
Affiliation(s)
- K. Shiraishi
- Department of Urology; Yamaguchi University School of Medicine; Ube Yamaguchi Japan
| | - A. Shindo
- Department of Urology; Yamaguchi University School of Medicine; Ube Yamaguchi Japan
| | - A. Harada
- Division of Transcriptomics; Medical Institute of Bioregulation; Kyushu University; Fukuoka Japan
| | - H. Kurumizaka
- Laboratory of Structural Biology; Graduate School of Advanced Science and Engineering; Waseda University; Tokyo Japan
| | - H. Kimura
- Cell Biology Unit; Institute of Innovative Research; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Ohkawa
- Division of Transcriptomics; Medical Institute of Bioregulation; Kyushu University; Fukuoka Japan
| | - H. Matsuyama
- Department of Urology; Yamaguchi University School of Medicine; Ube Yamaguchi Japan
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27
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Burikhanov R, Hebbar N, Noothi SK, Shukla N, Sledziona J, Araujo N, Kudrimoti M, Wang QJ, Watt DS, Welch DR, Maranchie J, Harada A, Rangnekar VM. Chloroquine-Inducible Par-4 Secretion Is Essential for Tumor Cell Apoptosis and Inhibition of Metastasis. Cell Rep 2017; 18:508-519. [PMID: 28076793 PMCID: PMC5264245 DOI: 10.1016/j.celrep.2016.12.051] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 05/05/2016] [Accepted: 12/15/2016] [Indexed: 12/11/2022] Open
Abstract
The induction of tumor suppressor proteins capable of cancer cell apoptosis represents an attractive option for the re-purposing of existing drugs. We report that the anti-malarial drug, chloroquine (CQ), is a robust inducer of Par-4 secretion from normal cells in mice and cancer patients in a clinical trial. CQ-inducible Par-4 secretion triggers paracrine apoptosis of cancer cells and also inhibits metastatic tumor growth. CQ induces Par-4 secretion via the classical secretory pathway that requires the activation of p53. Mechanistically, p53 directly induces Rab8b, a GTPase essential for vesicle transport of Par-4 to the plasma membrane prior to secretion. Our findings indicate that CQ induces p53- and Rab8b-dependent Par-4 secretion from normal cells for Par-4-dependent inhibition of metastatic tumor growth.
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Affiliation(s)
- Ravshan Burikhanov
- Department of Radiation Medicine, University of Kentucky, Lexington, KY 40356, USA
| | - Nikhil Hebbar
- Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA
| | - Sunil K Noothi
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, KY 40356, USA
| | - Nidhi Shukla
- Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA
| | - James Sledziona
- Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA
| | - Nathália Araujo
- Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA
| | - Meghana Kudrimoti
- Department of Radiation Medicine, University of Kentucky, Lexington, KY 40356, USA
| | - Qing Jun Wang
- Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA; Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40356, USA
| | - David S Watt
- Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40356, USA; Lucille Parker Markey Cancer Center, University of Kentucky, Lexington, KY 40356, USA
| | - Danny R Welch
- Department of Cancer Biology, University of Kansas, Kansas City, KS 66160, USA
| | - Jodi Maranchie
- Department of Urology, University of Pittsburgh, Pittsburgh, PA 15232, USA
| | - Akihiro Harada
- Department of Cell Biology, Osaka University, Osaka 565-0871, Japan
| | - Vivek M Rangnekar
- Department of Radiation Medicine, University of Kentucky, Lexington, KY 40356, USA; Graduate Center for Toxicology and Cancer Biology, University of Kentucky, Lexington, KY 40356, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky, Lexington, KY 40356, USA; Lucille Parker Markey Cancer Center, University of Kentucky, Lexington, KY 40356, USA.
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28
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Oguchi M, Harada A, Taguchi S, Terui Y, Hatake K, Takeuchi K, Fujisaki J. Difference of Relapse Pattern Between Nodal and Gastrointestinal Follicular Lymphomas. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Nakamura M, Nishikawa R, Hashimoto N, Ishihara T, Uezono H, Harada A, Mayahara H, Ejima Y, Nishimura H. Dosimetric Parameters Predicting Local Failure after Stereotactic Body Radiation Therapy Using the Robotic Radiosurgery System for Oligometastatic Lesions in the Lung and Liver. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Murofushi K, Tokumasu K, Kuwabara H, Kumai Y, Yoshida M, Harada A, Okubo H, Asari T, Toshiyasu T, Sumi M, Oguchi M. Interim MRI Provides Accurate Information of Brachytherapy for Patients with Locally Advanced Cervical Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Matsuura R, Miyagawa S, Harada A, Toda K, Kikuta J, Ishii M, Sawa Y. 5923Real-time cellular imaging of the beating heart in rat by using two-photon microscopy with an original stabilizer. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Matsui Y, Fujita R, Harada A, Sakurai T, Nemoto T, Toba K. GRIP PERFORMANCE AGILITY MEASURED WITH A NEW DYNAMOMETER IN SUBJECTS OF ALZHEIMER’S DEMENTIA PATIENTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y. Matsui
- Department of advanced medicine,National Center for Geriatrics and Gerontology, Obu, Japan,
| | - R. Fujita
- National Center for Geriatrics and Gerontology, Obu, Japan
| | - A. Harada
- National Center for Geriatrics and Gerontology, Obu, Japan
| | - T. Sakurai
- National Center for Geriatrics and Gerontology, Obu, Japan
| | - T. Nemoto
- National Center for Geriatrics and Gerontology, Obu, Japan
| | - K. Toba
- National Center for Geriatrics and Gerontology, Obu, Japan
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33
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Ishikawa T, Toyama T, Nakamura Y, Tamada K, Shimizu H, Ninagawa S, Okada T, Kamei Y, Ishikawa-Fujiwara T, Todo T, Aoyama E, Takigawa M, Harada A, Mori K. UPR transducer BBF2H7 allows export of type II collagen in a cargo- and developmental stage-specific manner. J Cell Biol 2017; 216:1761-1774. [PMID: 28500182 PMCID: PMC5461018 DOI: 10.1083/jcb.201609100] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 03/05/2017] [Accepted: 04/12/2017] [Indexed: 12/22/2022] Open
Abstract
The unfolded protein response (UPR) handles unfolded/misfolded proteins accumulated in the endoplasmic reticulum (ER). However, it is unclear how vertebrates correctly use the total of ten UPR transducers. We have found that ER stress occurs physiologically during early embryonic development in medaka fish and that the smooth alignment of notochord cells requires ATF6 as a UPR transducer, which induces ER chaperones for folding of type VIII (short-chain) collagen. After secretion of hedgehog for tissue patterning, notochord cells differentiate into sheath cells, which synthesize type II collagen. In this study, we show that this vacuolization step requires both ATF6 and BBF2H7 as UPR transducers and that BBF2H7 regulates a complete set of genes (Sec23/24/13/31, Tango1, Sedlin, and KLHL12) essential for the enlargement of COPII vesicles to accommodate long-chain collagen for export, leading to the formation of the perinotochordal basement membrane. Thus, the most appropriate UPR transducer is activated to cope with the differing physiological ER stresses of different content types depending on developmental stage.
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Affiliation(s)
- Tokiro Ishikawa
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Takuya Toyama
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Yuki Nakamura
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Kentaro Tamada
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Hitomi Shimizu
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Satoshi Ninagawa
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Tetsuya Okada
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Yasuhiro Kamei
- Spectrography and Bioimaging Facility, National Institute for Basic Biology, Okazaki 444-8585, Japan
| | - Tomoko Ishikawa-Fujiwara
- Department of Radiation Biology and Medical Genetics, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Takeshi Todo
- Department of Radiation Biology and Medical Genetics, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Eriko Aoyama
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School/Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8525, Japan
| | - Masaharu Takigawa
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School/Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8525, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita 565-0871, Japan
| | - Kazutoshi Mori
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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34
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Teoh JJ, Iwano T, Kunii M, Atik N, Avriyanti E, Yoshimura SI, Moriwaki K, Harada A. BIG1 is required for the survival of deep layer neurons, neuronal polarity, and the formation of axonal tracts between the thalamus and neocortex in developing brain. PLoS One 2017; 12:e0175888. [PMID: 28414797 PMCID: PMC5393877 DOI: 10.1371/journal.pone.0175888] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/02/2017] [Indexed: 12/17/2022] Open
Abstract
BIG1, an activator protein of the small GTPase, Arf, and encoded by the Arfgef1 gene, is one of candidate genes for epileptic encephalopathy. To know the involvement of BIG1 in epileptic encephalopathy, we analyzed BIG1-deficient mice and found that BIG1 regulates neurite outgrowth and brain development in vitro and in vivo. The loss of BIG1 decreased the size of the neocortex and hippocampus. In BIG1-deficient mice, the neuronal progenitor cells (NPCs) and the interneurons were unaffected. However, Tbr1+ and Ctip2+ deep layer (DL) neurons showed spatial-temporal dependent apoptosis. This apoptosis gradually progressed from the piriform cortex (PIR), peaked in the neocortex, and then progressed into the hippocampus from embryonic day 13.5 (E13.5) to E17.5. The upper layer (UL) and DL order in the neocortex was maintained in BIG1-deficient mice, but the excitatory neurons tended to accumulate before their destination layers. Further pulse-chase migration assay showed that the migration defect was non-cell autonomous and secondary to the progression of apoptosis into the BIG1-deficient neocortex after E15.5. In BIG1-deficient mice, we observed an ectopic projection of corticothalamic axons from the primary somatosensory cortex (S1) into the dorsal lateral geniculate nucleus (dLGN). The thalamocortical axons were unable to cross the diencephalon-telencephalon boundary (DTB). In vitro, BIG1-deficient neurons showed a delay in neuronal polarization. BIG1-deficient neurons were also hypersensitive to low dose glutamate (5 μM), and died via apoptosis. This study showed the role of BIG1 in the survival of DL neurons in developing embryonic brain and in the generation of neuronal polarity.
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Affiliation(s)
- Jia-Jie Teoh
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tomohiko Iwano
- Department of Anatomy and Cell Biology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Masataka Kunii
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Nur Atik
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Anatomy and Cell Biology, Faculty of Medicine, Padjadjaran University, Bandung, Indonesia
| | - Erda Avriyanti
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Dermatology and Venereology, Faculty of Medicine, Padjadjaran University, Bandung, Indonesia
| | - Shin-ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kenta Moriwaki
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- * E-mail:
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35
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Parry DA, Smith CE, El-Sayed W, Poulter JA, Shore RC, Logan CV, Mogi C, Sato K, Okajima F, Harada A, Zhang H, Koruyucu M, Seymen F, Hu JCC, Simmer JP, Ahmed M, Jafri H, Johnson CA, Inglehearn CF, Mighell AJ. Mutations in the pH-Sensing G-protein-Coupled Receptor GPR68 Cause Amelogenesis Imperfecta. Am J Hum Genet 2016; 99:984-990. [PMID: 27693231 PMCID: PMC5065684 DOI: 10.1016/j.ajhg.2016.08.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 08/17/2016] [Indexed: 01/11/2023] Open
Abstract
Amelogenesis is the process of dental enamel formation, leading to the deposition of the hardest tissue in the human body. This process requires the intricate regulation of ion transport and controlled changes to the pH of the developing enamel matrix. The means by which the enamel organ regulates pH during amelogenesis is largely unknown. We identified rare homozygous variants in GPR68 in three families with amelogenesis imperfecta, a genetically and phenotypically heterogeneous group of inherited conditions associated with abnormal enamel formation. Each of these homozygous variants (a large in-frame deletion, a frameshift deletion, and a missense variant) were predicted to result in loss of function. GPR68 encodes a proton-sensing G-protein-coupled receptor with sensitivity in the pH range that occurs in the developing enamel matrix during amelogenesis. Immunohistochemistry of rat mandibles confirmed localization of GPR68 in the enamel organ at all stages of amelogenesis. Our data identify a role for GPR68 as a proton sensor that is required for proper enamel formation.
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Kunii M, Ohara-Imaizumi M, Takahashi N, Kobayashi M, Kawakami R, Kondoh Y, Shimizu T, Simizu S, Lin B, Nunomura K, Aoyagi K, Ohno M, Ohmuraya M, Sato T, Yoshimura SI, Sato K, Harada R, Kim YJ, Osada H, Nemoto T, Kasai H, Kitamura T, Nagamatsu S, Harada A. Opposing roles for SNAP23 in secretion in exocrine and endocrine pancreatic cells. J Cell Biol 2016; 215:121-138. [PMID: 27697926 PMCID: PMC5057288 DOI: 10.1083/jcb.201604030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 08/26/2016] [Indexed: 12/17/2022] Open
Abstract
Kunii et al. reveal that the SNARE protein SNAP23 plays distinct roles in the secretion of amylase in exocrine cells and of insulin in endocrine cells the pancreas and show that MF286, a novel inhibitor of SNAP23, may be a new drug candidate for diabetes. The membrane fusion of secretory granules with plasma membranes is crucial for the exocytosis of hormones and enzymes. Secretion disorders can cause various diseases such as diabetes or pancreatitis. Synaptosomal-associated protein 23 (SNAP23), a soluble N-ethyl-maleimide sensitive fusion protein attachment protein receptor (SNARE) molecule, is essential for secretory granule fusion in several cell lines. However, the in vivo functions of SNAP23 in endocrine and exocrine tissues remain unclear. In this study, we show opposing roles for SNAP23 in secretion in pancreatic exocrine and endocrine cells. The loss of SNAP23 in the exocrine and endocrine pancreas resulted in decreased and increased fusion of granules to the plasma membrane after stimulation, respectively. Furthermore, we identified a low molecular weight compound, MF286, that binds specifically to SNAP23 and promotes insulin secretion in mice. Our results demonstrate opposing roles for SNAP23 in the secretion mechanisms of the endocrine and exocrine pancreas and reveal that the SNAP23-binding compound MF286 may be a promising drug for diabetes treatment.
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Affiliation(s)
- Masataka Kunii
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Noriko Takahashi
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Masaki Kobayashi
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Ryosuke Kawakami
- Laboratory of Molecular and Cellular Biophysics, Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - Yasumitsu Kondoh
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Takeshi Shimizu
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Siro Simizu
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Kanagawa 223-8522, Japan
| | - Bangzhong Lin
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Kazuto Nunomura
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Mitsuyo Ohno
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Masaki Ohmuraya
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takashi Sato
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Ken Sato
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Reiko Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan Department of Judo Therapy, Takarazuka University of Medical and Health Care, Hyogo 666-0152, Japan
| | - Yoon-Jeong Kim
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Tomomi Nemoto
- Laboratory of Molecular and Cellular Biophysics, Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - Haruo Kasai
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tadahiro Kitamura
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Akihiro Harada
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
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Oguchi M, Harada A, Terui Y, Hatake K, Takeuchi K, Iwase T. Relapse patterns of Treatment for Primary Breast Lymphomas. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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38
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Harada A, Toh R, Murakami K, Kiriyama M, Yoshikawa K, Kubo T, Miwa K, Irino Y, Mori K, Tanaka N, Ishida T, Hirata K. A potential role of cholesterol uptake capacity, a new measure for high-density lipoprotein functionality, in coronary risk stratification. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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Nakajo A, Yoshimura SI, Togawa H, Kunii M, Iwano T, Izumi A, Noguchi Y, Watanabe A, Goto A, Sato T, Harada A. EHBP1L1 coordinates Rab8 and Bin1 to regulate apical-directed transport in polarized epithelial cells. J Cell Biol 2016; 212:297-306. [PMID: 26833786 PMCID: PMC4739609 DOI: 10.1083/jcb.201508086] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The highly conserved Rab guanosine triphosphatase (GTPase) Rab8 plays a role in exocytosis toward the polarized plasma membrane in eukaryotic cells. In murine Rab8-deficient small intestine cells, apical proteins are missorted into lysosomes. In this study, we identified a novel Rab8-interacting protein complex containing an EH domain-binding protein 1-like 1 (EHBP1L1), Bin1/amphiphysin II, and dynamin. Biochemical analyses showed that EHBP1L1 directly bound to GTP-loaded Rab8 and Bin1. The spatial dependency of these complexes at the endocytic recycling compartment (ERC) was demonstrated through overexpression and knockdown experiments. EHBP1L1- or Bin1-depleted or dynamin-inhibited small intestine organoids significantly accumulated apical membrane proteins but not basolateral membrane proteins in lysosomes. Furthermore, in EHBP1L1-deficient mice, small intestine cells displayed truncated and sparse microvilli, suggesting that EHBP1L1 maintains the apical plasma membrane by regulating apical transport. In summary, our data demonstrate that EHBP1L1 links Rab8 and the Bin1-dynamin complex, which generates membrane curvature and excises the vesicle at the ERC for apical transport.
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Affiliation(s)
- Atsuhiro Nakajo
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Shin-ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Hiroko Togawa
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Masataka Kunii
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Tomohiko Iwano
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Ayaka Izumi
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Yuria Noguchi
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Ayako Watanabe
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Ayako Goto
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Toshiro Sato
- Department of Gastroenterology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
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40
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Aoyagi K, Ohara-Imaizumi M, Itakura M, Torii S, Akimoto Y, Nishiwaki C, Nakamichi Y, Kishimoto T, Kawakami H, Harada A, Takahashi M, Nagamatsu S. VAMP7 Regulates Autophagy to Maintain Mitochondrial Homeostasis and to Control Insulin Secretion in Pancreatic β-Cells. Diabetes 2016; 65:1648-59. [PMID: 26953164 DOI: 10.2337/db15-1207] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 03/03/2016] [Indexed: 11/13/2022]
Abstract
VAMP7 is a SNARE protein that mediates specific membrane fusions in intracellular trafficking and was recently reported to regulate autophagosome formation. However, its function in pancreatic β-cells is largely unknown. To elucidate the physiological role of VAMP7 in β-cells, we generated pancreatic β-cell-specific VAMP7 knockout (Vamp7(flox/Y);Cre) mice. VAMP7 deletion impaired glucose-stimulated ATP production and insulin secretion, though VAMP7 was not localized to insulin granules. VAMP7-deficient β-cells showed defective autophagosome formation and reduced mitochondrial function. p62/SQSTM1, a marker protein for defective autophagy, was selectively accumulated on mitochondria in VAMP7-deficient β-cells. These findings suggest that accumulation of dysfunctional mitochondria that are degraded by autophagy caused impairment of glucose-stimulated ATP production and insulin secretion in Vamp7(flox/Y);Cre β-cells. Feeding a high-fat diet to Vamp7(flox/Y);Cre mice exacerbated mitochondrial dysfunction, further decreased ATP production and insulin secretion, and consequently induced glucose intolerance. Moreover, we found upregulated VAMP7 expression in wild-type mice fed a high-fat diet and in db/db mice, a model for diabetes. Thus our data indicate that VAMP7 regulates autophagy to maintain mitochondrial quality and insulin secretion in response to pathological stress in β-cells.
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Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Seiji Torii
- Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Yoshihiro Akimoto
- Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Takuma Kishimoto
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Hayato Kawakami
- Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Masami Takahashi
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
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41
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Hayashi Y, Nishimune H, Hozumi K, Saga Y, Harada A, Yuzaki M, Iwatsubo T, Kopan R, Tomita T. A novel non-canonical Notch signaling regulates expression of synaptic vesicle proteins in excitatory neurons. Sci Rep 2016; 6:23969. [PMID: 27040987 PMCID: PMC4819173 DOI: 10.1038/srep23969] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/17/2016] [Indexed: 12/17/2022] Open
Abstract
Notch signaling plays crucial roles for cellular differentiation during development through γ-secretase-dependent intramembrane proteolysis followed by transcription of target genes. Although recent studies implicate that Notch regulates synaptic plasticity or cognitive performance, the molecular mechanism how Notch works in mature neurons remains uncertain. Here we demonstrate that a novel Notch signaling is involved in expression of synaptic proteins in postmitotic neurons. Levels of several synaptic vesicle proteins including synaptophysin 1 and VGLUT1 were increased when neurons were cocultured with Notch ligands-expressing NIH3T3 cells. Neuron-specific deletion of Notch genes decreased these proteins, suggesting that Notch signaling maintains the expression of synaptic vesicle proteins in a cell-autonomous manner. Unexpectedly, cGMP-dependent protein kinase (PKG) inhibitor, but not γ-secretase inhibitor, abolished the elevation of synaptic vesicle proteins, suggesting that generation of Notch intracellular domain is dispensable for this function. These data uncover a ligand-dependent, but γ-secretase-independent, non-canonical Notch signaling involved in presynaptic protein expression in postmitotic neurons.
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Affiliation(s)
- Yukari Hayashi
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan.,Department of Physiology, School of Medicine, Keio University, Tokyo 160-8582, Japan
| | - Hiroshi Nishimune
- Department of Anatomy and Cell Biology, University of Kansas Medical School, Kansas City, KS 66160, USA
| | - Katsuto Hozumi
- Department of Immunology, Tokai University School of Medicine, Kanagawa 259-1193, Japan
| | - Yumiko Saga
- Division of Mammalian Development, National Institute of Genetics, Shizuoka 411-8540, Japan.,Department of Genetics, SOKENDAI, Shizuoka 411-8540, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Michisuke Yuzaki
- Department of Physiology, School of Medicine, Keio University, Tokyo 160-8582, Japan
| | - Takeshi Iwatsubo
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Raphael Kopan
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA.,Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Taisuke Tomita
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan.,Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA
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42
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Watanabe Y, Ogura C, Hatanaka K, Okada Y, Watanabe T, Oishi H, Matsuda Y, Notsuda H, Harada A, Aoki M, Nagata T, Kariatsumari K, Nakamura Y, Sato M, Kondo T. MicroRNA Analysis in a Mouse Heterotopic Tracheal Transplant Model. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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43
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Kumai Y, Oguchi M, Miyagi Y, Ito Y, Iwase T, Akiyama F, Yoshida K, Harada A, Okubo H, Asari T, Murofushi K, Toshiyasu T, Kozuka T, Sumi M. EP-1164: Outcomes of postmastectomy radiotherapy in patients with 1 to 3 positive nodes in single institute. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32414-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Kobayashi S, Suzuki T, Kawaguchi A, Phongphaew W, Yoshii K, Iwano T, Harada A, Kariwa H, Orba Y, Sawa H. Rab8b Regulates Transport of West Nile Virus Particles from Recycling Endosomes. J Biol Chem 2016; 291:6559-68. [PMID: 26817838 DOI: 10.1074/jbc.m115.712760] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Indexed: 01/09/2023] Open
Abstract
West Nile virus (WNV) particles assemble at and bud into the endoplasmic reticulum (ER) and are secreted from infected cells through the secretory pathway. However, the host factor related to these steps is not fully understood. Rab proteins, belonging to the Ras superfamily, play essential roles in regulating many aspects of vesicular trafficking. In this study, we sought to determine which Rab proteins are involved in intracellular trafficking of nascent WNV particles. RNAi analysis revealed that Rab8b plays a role in WNV particle release. We found that Rab8 and WNV antigen were colocalized in WNV-infected human neuroblastoma cells, and that WNV infection enhanced Rab8 expression in the cells. In addition, the amount of WNV particles in the supernatant of Rab8b-deficient cells was significantly decreased compared with that of wild-type cells. We also demonstrated that WNV particles accumulated in the recycling endosomes in WNV-infected cells. In summary, these results suggest that Rab8b is involved in trafficking of WNV particles from recycling endosomes to the plasma membrane.
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Affiliation(s)
- Shintaro Kobayashi
- From the Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan, Laboratory of Public Health, Graduate School of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-Ku, Tokyo 162-8640, Japan
| | - Akira Kawaguchi
- From the Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan
| | - Wallaya Phongphaew
- From the Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan
| | - Kentaro Yoshii
- Laboratory of Public Health, Graduate School of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan
| | - Tomohiko Iwano
- Department of Anatomy and Cell Biology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimo-Kateau, Chuo, Yamanashi 409-3898, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan, and
| | - Hiroaki Kariwa
- Laboratory of Public Health, Graduate School of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan
| | - Yasuko Orba
- From the Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan
| | - Hirofumi Sawa
- From the Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan, Global Institution for Collaborative Research and Education (GI-CoRE) and Global Virus Network (GVN), Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan
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Nakamura K, Harada A, Ono M, Shibasaki H, Kanno T, Niwano Y, Adolfsson E, Milleding P, Örtengren U. Effect of low-temperature degradation on the mechanical and microstructural properties of tooth-colored 3Y-TZP ceramics. J Mech Behav Biomed Mater 2016; 53:301-311. [DOI: 10.1016/j.jmbbm.2015.08.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 08/20/2015] [Accepted: 08/24/2015] [Indexed: 02/04/2023]
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Shiraishi E, Suzuki K, Harada A, Suzuki N, Kimura H. The Phosphodiesterase 10A Selective Inhibitor TAK-063 Improves Cognitive Functions Associated with Schizophrenia in Rodent Models. ACTA ACUST UNITED AC 2015; 356:587-95. [DOI: 10.1124/jpet.115.230482] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 12/16/2015] [Indexed: 12/28/2022]
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47
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Ishihara T, Yamada K, Harada A, Isogai K, Miyawaki D, Yoshida K, Ejima Y, Sasaki R. Hypofractionated Stereotactic Radiation Therapy Compared With Stereotactic Radiosurgery for Brain Metastases From Lung Cancer: Experience at a Single-Institution. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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48
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Miura H, Kizawa Y, Bito S, Onozawa S, Shimizu T, Higuchi N, Goto Y, Takanashi S, Kubokawa N, Senda K, Nishikawa M, Harada A, Toba K. P-88 Benefits of the Japanese version advance care planning facilitator education program. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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49
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Takahashi T, Naka A, Aono M, Harada A, Sato Y, Kitajima Y. SUN-LB010: Comparison of Differences of the Living Environment and Nutritional Status in Elderly Dialysis Out-Patients. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30731-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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50
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Das S, Yu S, Sakamori R, Vedula P, Feng Q, Flores J, Hoffman A, Fu J, Stypulkowski E, Rodriguez A, Dobrowolski R, Harada A, Hsu W, Bonder EM, Verzi MP, Gao N. Rab8a vesicles regulate Wnt ligand delivery and Paneth cell maturation at the intestinal stem cell niche. J Cell Sci 2015. [DOI: 10.1242/jcs.175828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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